A.1% B.2% C.3% D.4%
A.A=0.8860h2 B.A=0.7265h2 C.A=hxhy D.A=0.5774h2
A.小數(shù)點(diǎn)后三位 B.小數(shù)點(diǎn)后兩位 C.三位有效數(shù) D.兩位有效數(shù)